Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f9bf9ad7a0993f879b05c2d3e7d2c0ade0ce232d015cca023753d3dfa0c688d' 
  AND token = 'aGLyxp2+0f35c8DbZRO0Z1JNwU8Sk1mSvvghoL6aKAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}